Would you be able to see if a patient had throat cancer if doing an upper endoscopy? how sure can you be you don't have throat cancer when result neg?

Perhaps: An upper endoscopy is a fiberoptic procedure typically administered by a gastroenterologist. The patient is usually sedated and lying down. The goal of this procedure is to look at the upper GI tract. A better exam to evaluate for laryngeal or pharyngeal cancer is a flexible fiberoptic laryngosocpy. This is performed by an head and neck surgeon. It is a smaller scope passed through the nose.